The California Title 24 Building Energy Efficiency Standards are designed to ensure new and existing buildings achieve energy efficiency and preserve outdoor and indoor environmental quality. These measures (Title 24, Part 6) are listed in the California
Code of Regulations. The California Energy Commission is responsible for adopting, implementing and updating building energy efficiency. Local city and county enforcement agencies have the authority to verify compliance with applicable building codes, including energy efficiency.
IESNA TM-21 (Technical Memorandum) specifies how to extrapolate the LM-80-08 lumen maintenance data to times beyond the LM-80 test time. For example: EPA ENERGY STAR® Manufacturer’s Guide requires L70 of 25,000 or 35,000 hours.
TM-21 is important because it is referenced in the EPA ENERGY STAR Guides, and customers generally are concerned about getting ENERGY STAR approvals for their products.
It is also important as it creates a common playing field for LED competitors to specify lumen maintenance behavior for their